Black-naped tern could be seen at Yung Shue Wan Pier from April to July .

Another scarce bird. Amazing how you keep finding these birds.
You are probably putting Lamma on the Bird-watching map.

Great flight shot although I suppose I'll have to wait till next year until I get a chance at them.

Am not sure [as I don't have binoculars], but there seems to be a flock of 5 birds flying around YSW harbour these days and may be resting on the rocks just outside the harbour. Do you know if these are Terns also ?

Terns are usually visiting Hong Kong in Summer . So I think the birds you saw are not terns . They may be egrets , seagulls or something else .